There’s been plenty of buzz about iBeacons and Bluetooth Low Energy radios – they’re supposed to do wonders for in-venue positioning, and plenty of companies have already expressed interest in deploying them in the field. But what is it like to actually stroll through a beacon-laden area? Curiously enough, Major League Baseball took on that challenge and recently decided to show off its vision of a Bluetooth-enabled ballpark at Citi Field in Queens, NY.